krantz



April 1s, 1929. A H. KRANTz n xke. 17,269.

TENTERING' AND RYING MACHINE TEXTILE FABRICS' original Filed Jan; 2s, i927 z` sheets-snaai 2 Apr.' 1 6,V 1929.v

A U'NlraosTA'res [PATENT OFFICE.'- a

' HUBERT nan'rz, or, Megan, amm.

Tmname am) name inclina'. ron TEXTILE Fumes Uriginal llo. 1,678,253, dated June 12, 1928, Serial No. 164,563, led January 2B, 198?, and in Germany February 3,1926. Application tor rcinue filed February 28, 18W, Serial lo. 342,236.

This invention relates to tentering and dry ing machines of the'type in which the fabric is guided in a tentered state through the d mg chamber. In the known machines of this kind, there is a certainA strain on the fabric in its longitudinaland transverse diV rection, wherefore these machines are also 'called stretching, tentering and drying Inav chiites. Without regard to the manner in L0 fivhohl the fabric, is fed to the conveying means, for instance to the usual conveying chains the strainis` mainly caused by the fact that the cloth contracts in its/longitudinal and transverse .direction in accordance-with the pro ress of the drying, while it is being rigidly eld by the chains. This is a disadvan e for certain fabrics, especially for woo en cloth, because woolen cloth when dried in a stretched condition is fixed sov that a subsequenti'natural contraction of the fabric in the finished product is rendered impossible. The tension in the transverse direction may be' avoided by introducing: the fabric into the machine with a considerable sag in the strain would not arise during the progress of the. drying action. However, conveying the fabric through the drying chamber in such a condition would entail serious drawbacks fabric from the chains, Contactin of adjacent fabric layers, impeding the circu ation of air, non-uniform drying, et cetera.'

Now, the invention has for its object to provide a tentering and drying machine of the above-stated kind in which both the longitudinal and transverse strains on the fabric are avoided in a simple and eilieient manner which does not in any way vaifectthe vfabric fabrics in a tentered state a non-tentered state. Y f

The object of the invention is attained on the conve mechanism at a speed so much larger than t e speedof'this mechanism that a longitudinal tension'ariseeneither during the seizing of the fabrieby ctmveying mechanismvnor during the gradually `reduced in' lccordancegwith the progress of in such a manner that a designed to direction of itswidth so that an additional j such as the danger .of a disengagement of the nor the security of workingy and which maintains. all advantages of the; drying o f textile over the' drying inf dg "f rocesa On the other hand, the breath of t egtenter, i. e. the distance between' thechainways, is

Afte the fabric emerges` is prevented too.

he invention allows of obtaining a dried goods which Iis' free from crumples.

In order Ato allow of the invention tobe more fully understood,it will now be described with reference to the accompanying drawings which illustrate, by way vof example, a

tentering and drying machine constructed in accordance with the invention.

Fig. 1 is a fractional-plan view, according to the line A-B of Fig. 3, of the `device prevent the longitudinalstrain and arrange in front of the inlet of the machine.V

Fig. 2 is a transverse section of the device along the line C--D of Fig. 3. l

3 is a side elevation of the device.

Fig. 4 is a plan view taken on the line Ef-F- of Fig. 3.

Fig. 5 is a diagrammatic longitudinal section of the machine and Fig. 6 is ,a diagrammatic transverse section ofthe same.

1 denotes the fabric which is fed to the machine M over a guide roller 1 in the usual way. -2 are the endless conveying chains which receive the fabric 1 and guide it through the machine.

Mounted loosely on suitably supported stub shafts 24, Fig. 2, at both sides of the machine are sprocket wheels 10 which are driven by the chains 2. The fabric is seized at its edges by feed rollers 11, 1 2 and fed into the machine in the direction of the arrows. The upper feed roller 12 is under the pressure of a spring 23. The lower feed roller y11 has roof the-said gearing. The upper feed roller the one hand by feedlng the wet fabric to through a shaft 25, gear wheels 14,15 and shaft26.` The rotary brush` 13 which serves to engage the fabric 1 with the hooks `2'` of the cha1ns2, is driven with Athe same circum. ferential speed as the feed rollersv 11, 12h-om the shaft 26 through the intermediary of the spur wheels 16 17 and 18, F' 1.

mths' feed fourie is throng the whole dryin chamber ofthe machineM in. the manner illustrated in Fig. 5. After leaving the machine at its lower `end, I

the fabric 1 disengages from the conveying chains 2 in a well known manner.

Fig. 6 shows the means which serve to decrease the breadth of the tenter, i. e. the distance between corresponding chainways 3, in accordance with the progress of the drying action. The chainways 3a are fastened to carrying bars 3- The distance between oppof site carrying bars i's adapted to be adjusted by means of threaded spindles 4 and 5 which pass through nuts 4'L and 5 which arepiv'otally mounted in the bars 3. vThe spindles 4 and 5 aremounted in a suitable manner in the side frames 9 of the machine. The upper s indles 4` are adapted to be driven by belt pu leys 6,

while the lower spindles 5 may be rotated 4 from the upper spindles through chain drives 7 As in the machine illustrated, the moisture-laden fabrics 1 are introduced into the dryingchainber at the top and the dry fab'- rics carried out of same at the bottom, provision has to be made for permittin the distance between the chainways to be ecreased 'downwardly in order to reduce the breadth of the tenter in accordance with the progressive drying. To this end, there is provided a c011- plin with a hand crank 8 by. means of which the c ain drive 7 may be disenga ed from the the latter a5' )usted independently from the upper spindle 4. In this way, any desired reduction of the breadth of the tenter may be easily obtained.

In cases where longitudinal and transverse tension on theA fabrics is admissible or desirable, the machine described may be used in the same manner as the known machines by returning the chainway-carryin bars 3 to the vertical position and causing t e fabric feeding means 11,12, 13 to-run with the same speed as the fabric conveying means 2. Having thus described my invention, what I claim as new and desire to secure by Letters Pat-ent, is:

f1. A tenterin and-drying machine, com 'prising a pair olfy horizontally spaced endless chains for conveying the fabric through the machine from top to ,bottoni along a circuitous path, a pluralit ofV vertically spaced airsof chainways or guiding'the chains, ooks on the chains for engagin and holding the fabric at its longitudinal edges, pairs of feed rollers for feeding the fabricto the conveying chains, rotary brushes for pressing the fabric edges into the hooks of the chains, means for 'imparting to the feed rollers and brushes a lead with respect to the chains, pairs carrying bars for placing the bars of each pair atan incline so as to gradually reduce I thel distance between them ina direction from the top to the bottom ofthe'machine.

2. A method'of drying fabric consistin in feeding thefabric through a drying cham er at a speed less than that at whichl the fabric is fed to the chamber, maintaining it laterally taut throughout the chamber, ',sulicient to prevent wrinkling of the fabric'but notV the shrinking thereof.

Dit.l HUBERT KRANTZ.

length of the drying l 

